Electromagnetic pressure reducing combination valve

Abstract

The utility model provides a kind of electromagnetic pressure reducing combination valve, comprising: pressure reducing valve shell and electromagnetic valve shell, pressure reducing valve shell and electromagnetic valve shell are connected to constitute combination valve shell;Cavity structure is provided in combination valve shell, inlet guide sleeve, outlet guide sleeve and valve core assembly are provided in cavity structure;Inlet guide sleeve is set on pressure reducing valve shell, and the position corresponding inlet guide sleeve on pressure reducing valve shell is provided with pressure reducing valve air inlet;Outlet guide sleeve is close to the end of electromagnetic valve shell and is provided with pressure reducing valve air outlet;Inlet guide sleeve and outlet guide sleeve are connected with valve core assembly, and valve core assembly is used to adjust the opening and closure of pressure reducing valve air inlet;Electromagnetic valve air inlet and electromagnetic valve air outlet are provided on electromagnetic valve shell, electromagnetic valve air inlet is connected with pressure reducing valve air outlet, and electromagnetic valve air outlet is connected with downstream electric pile.The utility model effectively solves the problem of electric pile alarm caused by slow rising of pressure reducing valve outlet locking pressure.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, specifically to an electromagnetic pressure reducing combination valve, and more particularly to a pressure reducing valve of an integrated electromagnetic valve specifically designed for high-pressure hydrogen storage and supply systems. Background Technology

[0002] Pressure reducing valves are crucial safety components in high-pressure hydrogen pipeline systems. Used in the low-pressure module of the hydrogen supply system, their main function is to throttle and reduce the pressure of high-pressure hydrogen to a set pressure, and to stabilize the pressure within a certain operating range, controlling the outlet pressure within a defined range. Pressure reducing valves typically play a vital role in the entire hydrogen system and are one of the most important components.

[0003] The on-board pressure reducing valve throttles and reduces the pressure of high-pressure hydrogen to a set pressure before it is introduced into the downstream fuel cell stack. If the pressure is too low, the fuel cell stack will experience a "hydrogen shortage" phenomenon. In order to make full and efficient use of the fuel cell stack, the outlet pressure of the pressure reducing valve needs to be set above a certain threshold. Because the outlet locking pressure of the pressure reducing valve has a slow rise phenomenon, it may cause the downstream pressure to be too high. If the pressure is too high, it will affect the proton exchange membrane and sealing structure in the fuel cell stack, resulting in fuel cell stack alarms and vehicle malfunctions.

[0004] Patent document CN212564574U discloses a pressure reducing valve for a hydrogen supply system, relating to the technical field of pressure reducing valves. It includes a valve body and a valve cover. The valve body has a hexagonal prism structure and an internal cavity. Cavity one contains a base, valve seat, valve stem, and valve stem spring. A second cavity is formed between the valve cover, the hollow cylinder, and the valve body. Cavity two contains a spring seat, adjusting spring, piston, and adjusting screw. The upper end of the valve stem passes through the base and contacts the bottom of the piston. The valve body has a pressure relief port and a pressure sensor port, both connected to cavity two. A pressure relief valve is installed in the pressure relief port, and a pressure sensor is installed in the pressure sensor port. However, this patent document still has the drawback of a slow rise in outlet locking pressure, leading to excessively high downstream pressure. Utility Model Content

[0005] In view of the deficiencies in the existing technology, the purpose of this utility model is to provide an electromagnetic pressure reducing combination valve.

[0006] According to the present invention, an electromagnetic pressure reducing combination valve includes: a pressure reducing valve housing and an electromagnetic valve housing, wherein the pressure reducing valve housing and the electromagnetic valve housing are connected to form a combination valve housing;

[0007] The combined valve housing is provided with a cavity structure, and the cavity structure is provided with an inlet guide sleeve, an outlet guide sleeve and a valve core assembly;

[0008] The inlet guide sleeve is disposed on the pressure reducing valve housing, and the pressure reducing valve housing is provided with a pressure reducing valve inlet corresponding to the position of the inlet guide sleeve; the outlet guide sleeve is provided with a pressure reducing valve outlet at one end near the solenoid valve housing.

[0009] The inlet guide sleeve and the outlet guide sleeve are connected to the valve core assembly, which is used to adjust the opening and closing of the air inlet of the pressure reducing valve;

[0010] The solenoid valve housing is provided with a solenoid valve inlet and a solenoid valve outlet. The solenoid valve inlet is connected to the pressure reducing valve outlet, and the solenoid valve outlet is connected to the downstream fuel cell stack.

[0011] Preferably, the valve core assembly includes: a spring, a valve core, and a piston;

[0012] One end of the piston is located inside the inlet guide sleeve, and the other end of the piston is located inside the outlet guide sleeve;

[0013] The piston is connected to the pressure reducing valve housing via the spring;

[0014] The valve core is mounted on the piston and is used to regulate the opening and closing of the air inlet of the pressure reducing valve.

[0015] Preferably, an annular cavity is formed between the piston and the inlet guide sleeve;

[0016] The piston is provided with a piston hole, and the annular cavity is connected to the air outlet of the pressure reducing valve through the piston hole;

[0017] When the valve core opens the air inlet of the pressure reducing valve, the annular cavity is connected to the air inlet of the pressure reducing valve.

[0018] Preferably, a pressure-reducing chamber is formed between the piston and the outlet guide sleeve;

[0019] The piston is provided with a through hole, and the pressure relief chamber is connected to the piston hole through the through hole.

[0020] Preferably, a spring cavity is formed between the piston, the inlet guide sleeve, and the outlet guide sleeve;

[0021] The spring is located inside the spring cavity.

[0022] Preferably, the piston is provided with a first sealing device;

[0023] The piston is sealed to the inlet guide sleeve via the first sealing device;

[0024] The first sealing device is used to isolate gas transmission between the annular cavity and the spring cavity.

[0025] Preferably, the piston is provided with a second sealing device;

[0026] The piston is sealed to the outlet guide sleeve via the second sealing device;

[0027] The second sealing device is used to isolate gas transmission between the pressure reducing chamber and the spring chamber.

[0028] Preferably, the outlet guide sleeve is provided with a third sealing device;

[0029] The outlet guide sleeve is sealed to the solenoid valve housing via the third sealing device.

[0030] Preferably, the first sealing device, the second sealing device, and the third sealing device are all sealing rings.

[0031] Compared with the prior art, the present invention has the following beneficial effects:

[0032] This invention integrates a solenoid valve after the pressure reducing valve. When the solenoid valve is closed, the slow rise of the pressure reducing valve only exists between the pressure reducing valve and the solenoid valve, that is, only inside the integrated valve. The hydrogen pressure downstream of the integrated valve is consistent with the dynamic pressure before the solenoid valve is closed. Structurally, this design eliminates the possibility of excessively high locking pressure in a single integrated valve, solving a major problem for the entire high-pressure storage and supply industry. Attached Figure Description

[0033] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0034] Figure 1 Cross-sectional view of the electromagnetic pressure reducing combination valve Figure 1 ;

[0035] Figure 2 Cross-sectional view of the electromagnetic pressure reducing combination valve Figure 2 ;

[0036] Figure 3 Cross-sectional view of the electromagnetic pressure reducing combination valve Figure 3 .

[0037] The diagram shows:

[0038] First sealing device 1 Third sealing device 9

[0039] Spring 2, Piston 10

[0040] Pressure reducing valve inlet 3 First piston section 1001

[0041] Valve core 4 Second piston section 1002

[0042] Pressure reducing valve housing 5 Third piston section 1003

[0043] Export guide sleeve 6, piston inlet 1004

[0044] First guide section 601 Solenoid valve inlet 11

[0045] Second guide section 602, annular cavity 21

[0046] Limiting step 603 Piston hole 22

[0047] Second sealing device 7, pressure relief chamber 23

[0048] Solenoid valve housing 8, spring chamber 24 Detailed Implementation

[0049] The present invention will now be described in detail with reference to specific embodiments. These embodiments will help those skilled in the art to further understand the present invention, but do not limit the present invention in any way. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all fall within the protection scope of the present invention.

[0050] Example 1:

[0051] like Figures 1 to 3 As shown, this embodiment provides an electromagnetic pressure reducing combination valve, including: a pressure reducing valve housing 5 and a solenoid valve housing 8, which are connected to form a combination valve housing; a cavity structure is provided inside the combination valve housing, and an inlet guide sleeve, an outlet guide sleeve 6, and a valve core assembly are provided inside the cavity structure; the inlet guide sleeve is provided on the pressure reducing valve housing 5, and a pressure reducing valve inlet 3 is provided on the pressure reducing valve housing 5 at the position corresponding to the inlet guide sleeve; a pressure reducing valve outlet is provided at the end of the outlet guide sleeve 6 near the solenoid valve housing 8; the inlet guide sleeve and the outlet guide sleeve 6 are connected to the valve core assembly, which is used to adjust the opening and closing of the pressure reducing valve inlet 3; a solenoid valve inlet 11 and a solenoid valve outlet are provided on the solenoid valve housing 8, the solenoid valve inlet 11 is connected to the pressure reducing valve outlet, and the solenoid valve outlet is connected to the downstream fuel cell stack.

[0052] In this embodiment, the inlet guide sleeve and the pressure reducing valve housing 5 are integrally formed structures.

[0053] The valve core assembly includes: spring 2, valve core 4, and piston 10; one end of piston 10 is located inside the inlet guide sleeve, and the other end of piston 10 is located inside the outlet guide sleeve 6; piston 10 is connected to pressure reducing valve housing 5 through spring 2; valve core 4 is mounted on piston 10 and is used to adjust the opening and closing of pressure reducing valve inlet 3.

[0054] In this embodiment, spring 2 is sleeved on the inlet guide sleeve.

[0055] An annular cavity 21 is formed between the piston 10 and the inlet guide sleeve; a piston hole 22 is provided on the piston 10, and the annular cavity 21 communicates with the outlet of the pressure reducing valve through the piston hole 22; when the valve core 4 opens the inlet 3 of the pressure reducing valve, the annular cavity 21 communicates with the inlet 3 of the pressure reducing valve. A pressure reducing cavity 23 is formed between the piston 10 and the outlet guide sleeve 6; a through hole is provided on the piston 10, and the pressure reducing cavity 23 communicates with the piston hole 22 through the through hole. A spring cavity 24 is formed between the piston 10, the inlet guide sleeve, and the outlet guide sleeve 6; the spring 2 is located in the spring cavity 24.

[0056] A first sealing device 1 is provided on the piston 10; the piston 10 is sealed to the inlet guide sleeve through the first sealing device 1; the first sealing device 1 is used to isolate gas transmission between the annular cavity 21 and the spring cavity 24. A second sealing device 7 is provided on the piston 10; the piston 10 is sealed to the outlet guide sleeve 6 through the second sealing device 7; the second sealing device 7 is used to isolate gas transmission between the pressure reducing cavity 23 and the spring cavity 24. A third sealing device 9 is provided on the outlet guide sleeve 6; the outlet guide sleeve 6 is sealed to the solenoid valve housing 8 through the third sealing device 9. The first sealing device 1, the second sealing device 7, and the third sealing device 9 are all sealing rings.

[0057] In this embodiment, the outlet guide sleeve 6 includes: a first guide portion 601 and a second guide portion 602 integrally formed, the first guide portion 601 and the second guide portion 602 forming a boss structure.

[0058] In this embodiment, the piston 10 includes: a first piston portion 1001, a second piston portion 1002, and a third piston portion 1003, which are integrally formed.

[0059] The first piston part 1001 is located inside the inlet guide sleeve, and the first sealing device 1 is disposed on the first sealing device 1.

[0060] The second piston portion 1002 is located inside the first guide portion 601, and the second sealing device 7 is disposed on the second piston portion 1002. The first guide portion 601 is provided with a limiting step 603 for limiting the second piston portion 1002.

[0061] The third piston section 1003 is located inside the second guide section 602.

[0062] The third sealing device 9 is provided on the second guide portion 602.

[0063] The first piston section 1001 is provided with a piston air inlet 1004, which is connected to the annular cavity 21. One end of the piston hole 22 is connected to the piston air inlet 1004, and the other end of the piston hole 22 passes through the first piston section 1001, the second piston section 1002 and the third piston section 1003 and is connected to the air outlet of the pressure reducing valve.

[0064] Example 2:

[0065] Those skilled in the art can understand this embodiment as a more specific description of Embodiment 1.

[0066] This embodiment provides a pressure reducing valve structure integrating a solenoid valve at the outlet of a pressure reducing valve, relating to the technical field of high-pressure hydrogen storage and supply systems, and particularly to a pressure reducing valve structure of an integrated solenoid valve specifically for high-pressure hydrogen storage and supply systems, effectively solving the problem of slow rise in pressure reducing valve outlet locking pressure causing fuel cell stack alarm.

[0067] like Figure 1-3 As shown, the integrated solenoid valve pressure reducing valve structure comprises two modules: a pressure reducing valve module and a solenoid valve module. The solenoid valve module is located downstream of the pressure reducing valve module. The two modules are tightly connected by six bolts to form an integrated valve. The pressure reducing valve structure includes an inlet guide sleeve, a valve core, an outlet guide sleeve, a piston, and a spring. Both the pressure reducing valve body inlet and the solenoid valve body outlet are equipped with adapters for connection to the pipeline system, facilitating debugging and use.

[0068] The fluid flows from the pressure reducing valve inlet to the solenoid valve, and finally out of the solenoid valve. Both the pressure reducing valve inlet and the solenoid valve outlet are equipped with interfaces, and adapters are provided at the interfaces to connect to various pipelines.

[0069] When the pressure reducing valve is working, hydrogen gas enters through the throttling orifice at the valve inlet 3, restricting its flow and thus reducing pressure. The reduced-pressure gas then flows into the solenoid valve inlet 11. The opening height between the piston 10 and the pressure reducing valve housing 5 changes in real time. When the outlet pressure is insufficient, the spring force is greater than the hydrogen pressure on the piston 10, driving the piston 10 to move to the right, increasing the opening height, allowing more hydrogen to pass through, and raising the outlet pressure. Conversely, when the outlet pressure is too high, the spring force is less than the hydrogen pressure on the piston 10, driving the piston 10 to move to the left, decreasing the opening height, allowing less hydrogen to pass through, and lowering the outlet pressure.

[0070] The pressure reducing valve in this embodiment is a positive non-unloading piston pressure reducing valve. The above describes the basic working principle of the pressure reducing valve of this invention. The integrated solenoid valve is a switching valve; it opens when energized, outputting depressurized hydrogen gas; it closes when de-energized, ceasing hydrogen gas output and serving a shut-off function. The internal structure and principle of the solenoid valve will not be elaborated upon here. When the pressure reducing valve is working, the valve core 4 opens under the action of hydrogen pressure, and hydrogen gas flows into the annular cavity 21 channel between the pressure reducing valve housing 5 and the piston 10, eventually flowing out through the piston hole 22. Simultaneously, the depressurized hydrogen gas flows into the cavity between the piston 10 and the outlet guide sleeve 6 through the connecting perforation on the piston 10, causing the piston 10 to be subjected to a leftward thrust from the depressurized hydrogen gas. This cavity can be called the pressure reducing cavity 23. The cavity between the pressure reducing valve housing 5, the piston 10, and the outlet guide sleeve 6 is the spring cavity 24. The first sealing device 1 prevents hydrogen gas flowing out of the annular cavity 21 from entering the spring cavity 24 and eventually escaping from the gap between the pressure reducing valve housing 5 and the solenoid valve housing 8; the second sealing device 7 prevents hydrogen gas from flowing into the spring cavity 24 from the pressure reducing cavity 23 and eventually escaping from the gap between the pressure reducing valve housing 5 and the solenoid valve housing 8; the third sealing device 9 prevents hydrogen gas from escaping from the gap between the pressure reducing valve housing 5 and the solenoid valve housing 8 during the process of hydrogen gas entering the solenoid valve inlet 11 from the piston hole 22.

[0071] When the downstream valve of the pressure reducing valve suddenly closes, the pressure reducing valve will also close, and the pressure at this time is the static pressure. Although the closing of the pressure reducing valve is very rapid, it still requires a certain process. During the closing process, hydrogen gas continues to fill the downstream area. Since the downstream area is already closed, the outlet pressure will experience a momentary surge; this pressure is called the static pressure. There are two scenarios for static pressure and locking pressure:

[0072] a) The downstream cavity is large, while the pressure reducing valve has a small stroke. Therefore, only a small amount of hydrogen enters the downstream at the moment of closing, and the static pressure is less than the locking pressure. At this time, the pressure reducing valve cannot completely seal, and hydrogen will continue to slowly leak downstream, causing the outlet pressure to continue to rise and gradually reach the locking pressure.

[0073] b. The downstream cavity is very small, the pressure reducing valve has a large stroke, and a lot of hydrogen enters the downstream at the moment of closing. The static pressure is greater than the locking pressure, the pressure reducing valve achieves the sealing effect, and the outlet pressure will not continue to rise. At this time, the locking pressure is the static pressure.

[0074] The slow rise in the outlet locking pressure of the pressure reducing valve can lead to excessively high downstream pressure. Excessive pressure can affect the proton exchange membrane and sealing structure in the fuel cell stack, causing stack alarms and vehicle malfunctions. Therefore, this embodiment integrates a solenoid valve after the pressure reducing valve. When the solenoid valve is closed, the slow rise in pressure reducing valve pressure only exists between the pressure reducing valve and the solenoid valve, that is, only within this integrated valve. The hydrogen pressure downstream of this integrated valve remains consistent with the dynamic pressure before the solenoid valve closes. Although this invention cannot completely solve the special phenomenon of slow rise in pressure reducing valve pressure, structurally it can be said that a single integrated valve eliminates the possibility of excessively high locking pressure, solving a major problem for the entire high-pressure energy storage and supply industry.

[0075] This invention effectively solves the problem of slow pressure rise at the outlet of the pressure reducing valve causing an alarm on the fuel cell stack.

[0076] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0077] The specific embodiments of this utility model have been described above. It should be understood that this utility model is not limited to the specific embodiments described above, and those skilled in the art can make various changes or modifications within the scope of the claims, which do not affect the substantive content of this utility model. Unless otherwise specified, the embodiments and features described in this application can be arbitrarily combined with each other.

Claims

1. An electromagnetic pressure reducing combination valve, characterized in that, include: A pressure reducing valve housing (5) and a solenoid valve housing (8) are connected to form a combined valve housing; The combined valve housing is provided with a cavity structure, and the cavity structure is provided with an inlet guide sleeve, an outlet guide sleeve (6) and a valve core assembly; The inlet guide sleeve is disposed on the pressure reducing valve housing (5), and the pressure reducing valve housing (5) is provided with a pressure reducing valve inlet (3) corresponding to the position of the inlet guide sleeve; the outlet guide sleeve (6) is provided with a pressure reducing valve outlet at one end near the solenoid valve housing (8); The inlet guide sleeve and the outlet guide sleeve (6) are connected to the valve core assembly, which is used to adjust the opening and closing of the pressure reducing valve inlet (3); The solenoid valve housing (8) is provided with a solenoid valve inlet (11) and a solenoid valve outlet. The solenoid valve inlet (11) is connected to the pressure reducing valve outlet, and the solenoid valve outlet is connected to the downstream fuel cell stack.

2. The electromagnetic pressure reducing combination valve according to claim 1, characterized in that, The valve core assembly includes: a spring (2), a valve core (4), and a piston (10); One end of the piston (10) is located inside the inlet guide sleeve, and the other end of the piston (10) is located inside the outlet guide sleeve (6); The piston (10) is connected to the pressure reducing valve housing (5) via the spring (2); The valve core (4) is disposed on the piston (10), and the valve core (4) is used to adjust the opening and closing of the air inlet (3) of the pressure reducing valve.

3. The electromagnetic pressure reducing combination valve according to claim 2, characterized in that, An annular cavity (21) is formed between the piston (10) and the inlet guide sleeve; The piston (10) is provided with a piston hole (22), and the annular cavity (21) is connected to the air outlet of the pressure reducing valve through the piston hole (22); When the valve core (4) opens the air inlet (3) of the pressure reducing valve, the annular cavity (21) is connected to the air inlet (3) of the pressure reducing valve.

4. The electromagnetic pressure reducing combination valve according to claim 3, characterized in that, A pressure-reducing cavity (23) is formed between the piston (10) and the outlet guide sleeve (6); The piston (10) is provided with a through hole, and the pressure relief chamber (23) is connected to the piston hole (22) through the through hole.

5. The electromagnetic pressure reducing combination valve according to claim 4, characterized in that, A spring cavity (24) is formed between the piston (10), the inlet guide sleeve and the outlet guide sleeve (6); The spring (2) is located inside the spring cavity (24).

6. The electromagnetic pressure reducing combination valve according to claim 5, characterized in that, The piston (10) is provided with a first sealing device (1); The piston (10) is sealed to the inlet guide sleeve through the first sealing device (1); The first sealing device (1) is used to isolate gas transmission between the annular cavity (21) and the spring cavity (24).

7. The electromagnetic pressure reducing combination valve according to claim 6, characterized in that, The piston (10) is provided with a second sealing device (7); The piston (10) is sealed to the outlet guide sleeve (6) through the second sealing device (7); The second sealing device (7) is used to isolate the gas transmission between the pressure reducing chamber (23) and the spring chamber (24).

8. The electromagnetic pressure reducing combination valve according to claim 7, characterized in that, The outlet guide sleeve (6) is provided with a third sealing device (9); The outlet guide sleeve (6) is sealed to the solenoid valve housing (8) through the third sealing device (9).

9. The electromagnetic pressure reducing combination valve according to claim 8, characterized in that, The first sealing device (1), the second sealing device (7) and the third sealing device (9) are all sealing rings.

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